Stamping machine



June 15, 1926-. 1,588,410

J. GOULDBOURN ET AL STAMPING MACHINE Filed Dec. 4, 1922 Patented June 1 5, 1 926.

UNITED STATES JOSEPH GOULDBOUB-N AND FRANK BYcn-orr KEALL, on LEICESTER, ENGLAND, As

v 4 V 1 ,588,410 PATENTfOFFICE.

sreNoas To UNITED srron MACHINERY coaronarroN, orrArnasoN, NEW JER- SEY, A CORPORATIONOF NEWJERSEY. I

STAMPING MACHINE.

' Application filed December 4, 1922, Serial No This invention relates to presses and is herein shown as embodied in a machine for stamping or impressing work pieces, such as shoe soles, with identifying symbols.

Sole leather varies appreciably in thick ness and in density or hardness, and in stamping machines that take no' account of these characteristics, symbols impressed on different pieces of work are not uniform-in appearance or depth. An object of this invention is to provide an improved machine for applying uniform impressions to work pieces having varying characteristics especially as to thickness. As a feature of the invention, the work pieces arealways gripped with a uniform pressure between two co-operating pressure members one of which has a preliminary work gripping or measuring movement under spring control there being a subsequent positive movement of said member-for a predetermined distance I 1 to effect an impression of the desired depth. In the illustratedembodiment of the inven- 2 tion, the head has a projecting stud for the objects of the invention will appear from aconsideration of the followingspecification and accompanying drawings ,in which Fig. 1 is aside elevation, with some parts in section, of the machine; 7 I

a Fig. 2 is a detail View of a portion of the driving mechanism. Fig. 3 is a side view of the printing head with some parts'in section.

In the illustrated machine, the printing head is normally in a fixed position so that there is no rapidly moving part directly in front of the operator to distract or oppress him; the main clearance movement-"takes place from below'and the work is pressed.

upwardly against type wheels on the printing head. A frame 2.has an overhanging reception of interchangeable type wheels,

180 to invert the symbols so that they may.

. 60437 and in Great Britain January 7, 1922.

arm 4 in the forward end of which is a cylindrical opening 6. The printing head comprising a bracket 8 has a vertical trunnion 10 swivelled in theopening 6 and having an extension 12 rotatably mounted in a flanged bushing 14 at the top of the overhanging arm. The extension 12'is threaded at its upper end for'the reception of a hand the printing head may be drawn tightly against a corresponding face on the under side of the overhanging arm. The head is locked in either of two positions by a pin 20 projecting from the head and arranged to engage either one of two openings 22and 24 which are 180 apart on the under side of the'arm. It is apparent that, by turning the hand nut 16, the head can'be made to descend nut 16 by means. of which a flat face 18-on1 untilthe pin 20 slides out of one of the openings after which the head can be turned until the pin registers with the opposite opening. Thereupon by tightening-the hand nut, the head can again ber'aised to a locked position with the symbols on the type inverted. By this means, the symbols can be faced either way at the end of-a comparatively long piece of work. Heretofore, with nonreversible heads, a deep'throat opening below i the overhanging arm has been needed to receive the work Whenthe symbolswere to be inverted. p I, i

There projects from the bracket 8 a horizontal stud 26 on which is'rotatably mounted a plurality of dies in the-form of type wheels 28, The stud, in thelform shown, is arranged to receive three type wheels which are held in place by a hook 32 engaging a recess 30 in the end of the stud, the" hook being formed on a swinginglatch The hook is held in locked position by a .Ispring pressed detent 38-housed in a recess of the. swinging latch. Around the interior of each typewheel is a seriesof notches 40 arranged to be engaged by a spring-pressed locking plunger 42 in a recess of the stud 26. Forturningthe type wheels to select the characters to be printed, a gear wheel i i is fixed to a rod 46 which is slidably and ro-' tatably mounted in a bracket on the head so that the gear canbe slid into engagement turned to select the character desired. In

with any one of the type wheels and then '34 pivoted to a stud 36 above the type wheels. i

an opening at the lower end ofthe bracket 7 8 there secured liaising-1e :stan p ifi having any desired- Character lyingin line with the lowermost type on the type wheels.

he, type. on the type =wheels form ng pres- 7 sure receiving member when is normally fixed and a movable pressure applying member cooperates with the'first member and is in the form of a Work table 50 having-asuh stantially cylindrical stem 52 slidable in a sleeve '54 which, in turn, is :slidablefitoza slight extent in the casing 56 projecting from the "frame. The sleeve has a =-cened ep enin-g 58% the 'cenicalsurfaceof which rests npon:-acone-pointed screw"-60,=' the letterheing adjustable in order 5 to; vary the initial position of 4 the sleeve "for a purpose Wvliih -wl1l appear latter. The sleeve 7 5& hasc1reu- -lar vertical openings hensing springs "62 which normally tend to urge the Wei-k table upwardly to carry a" piece (if =-work against the type wheels. In the stopped position of the machine, hewever; the nip-Ward movement of tthe table underthe influence of the "springs l-is; prevented by a "pin 64 passing through a lost *metion slot 66" in the stem V andz-enteri-ngaslot68-inthesleeve; The pin "engagesthe steinat*the -lower end 6f the slot '66 and hbldsthe stein de'wn, theref'bemg' a linliWO joined' tothe pin*andFhavrng its lower one-crankpin76'. EThe'link i'O hasvaverti- =c2tl recess 2 receiving a spring "78' interposed between the-bottom efrthe recess-and r't-he Phlotk 74" so that-When the hlockrises, the 11p- 5 ward thrust his a yieldinge-ne. The block 74, hewever, engagesaf bloek 800011necting thearrns of the bifurcated link and-holds the 151 11;; the pin, thesteinand the table down when the machine is;-.'sto-pp ea. Th e-pin 64 is *also connectedv to ahlohk 82-slidahleiinwent- "out portion 6f the-stein 52-and having an inclined cam face 84 arranged to enga ge a I efi lin di-ieal roll 86 "extendingacross"- a-recess 7 in "the stein"and-enteringtsvo- -"opposite hori- "'zont-al slots 88Pin the sleeve, 54.

W'h en th e machine -is-star-td, the link"'. is released by the iblo'c'k "7% and the ripwar'd movement of tl'ievflsiniet a1lo-wsthe springs 62. to force the work table upwardly to grip tion" is va yielding" one; and resell-ts in a sl'ihstant-iailly Hiniform pressure on the z work whatever "its thickness "be. "lVhent the movement ofthe work table isthns arre stead,-

55 th'e pin erasethe11010eieee-eenenuwo rise,

* loeked together by the m ll; thetable" must rise-zwpredetermined distance Whiehdepends *upon the'initial-positien (if the sleeve and the travel of the roll 92 after it engages said Lsleewe.v {As ahove-vstated, the minitial pesition ,ofthe sleeve can be varied by turning the .;e0ne=pointed vscrew 6.0 [in Jor out. Thus there is adefinite upward movement of the ztahlei-tafiter the work has been clamped between the Work table and the dies and conselquentl yirthe.depthvof theiinpr-iession for a given line of Work is constant and independent' of *the thickness or 7 degree of hardness G ft-he inateri a An eidge get 96' is formed 5on theend r a rod 98'=--:Whieh is slidable in a bearing 0 f the J'I'rainei and; 'ela/mpied in any desired position! hya clamp eserew 100.

Although the inventions-hes bee-n described with -.spe'ciztl reference :tostamping, it isxn'ot, f in its hre ader aspect-s, necessarily 5 li'flliiiGIdJZO this ope-ration. Having -descrihed our invention, .rwha we .eiaim as new and desire! to secnre! Letters Patent ofthe iUnited States is f1. A -sta-ln 1ping :rinachine having, in .eombinati-on, a ffraine, sta'nipi'ngdies carried! the'franie, avwoi'k table, springs' forwcans ing rela tive: movement "of approach between the work table and the dies: to clamp-a piece 'of: We rk yield-inglyy-andineans fon-thereaiter l causing -re1ative movement of i the sdies; end the-svork table throughwa predetermined.:.distavnce to'e ifect an impression.

' A- stamping -machine having, 2 in :eoni- Joinatio n, a frame havin gnn overhanging awn 1, aplurality e 1 i'etarystan i faing dies normally held in -a--' F *ed pesitionnon-the-overhangi nga arm, a- -we1gk taihle ineansforrais- :1 g the work table yieldingly to clamp Work v pieces e1. different thic -knesses With 1311658321118 pressure against 1 the 'd-ies, end 1 means tor th'erea f-ter raising the wvor'k tahle p osit-ively --adefinite distance i to effect :an impression =of;predetermined de fath.

'3 2y enaeh'i-ne -of 'the elass- 'deser'ibe'd having, incoin ation; a pai-ref coacting pres- :sl-llef'mel-fl-bfil'fif adapted to receive #between Y them wvork pieces of difi 'erent thielniesses, a hollow guide 'i or one :ef said :members,

springs between-"said guide and one of; said "HIGHlbGI-S- 11 0;] i normally I urging one of a said members teward the other member, means fer controlling theaction-o=fisaid springs to effect a preliminary I; workclamping movelTlGIlt, "and means ier subsequently causing additional relative 'mO'velnehtv fSfiidflllBIIlhers: toga-pply pressure to the work;

4. A machine of the "class*desciiihedihav- =ing,"-i-n combination; afixed pressme receive 5 i-ng' member and a movable pressure applyiing- "member adapted (t0 -receivebetween "them work pieees-r if difl'erent thicknesses, a

rlhoillowwguside for 'i the movable imem'rber,

smeztns -'for normally Surging said i movable 7 :member towardrthesfixed member, means for zcontnolhng:the;:.aet10n -.of-:sa-1d means to-. .ef-

feet a preliminary work clamping movement of the movable member, means for locking said guide to the movable member, and means for subsequently causing a pressure applying movement of said guide and iovable member.

5. A machine of the class described having, in combination, a fixed pressure receiving member, a movable pressure applying member, springs for yieldingly moving said movable member toward the first member to effect a preliminary work clamping move ment, means for controlling the action of said springs, means for subsequently causing a pressure applying movement of the movable member through a definite distance, and means for varying said distance.

6. A machine of the class described having, in combination, a fixed pressure receivmg member, a work table slidable toward the member, means for preliminarily moving said table toward the member to grip a piece of work, a slidable member for guiding the table, means for locking the table to the slidable member, and means engaging said slidable member after the locking action to cause a positive movement of said table. r

7. A machine of the class describe-d having, in combination, a fixed pressure receiving member, a work table sli-dable toward the member, means for moving said table towards the member to grip a piece of work, a slidable member for guiding the table, means for locking the table to the slidable member, means engaging said slidable memher after the locking action to move said table a. predetermined distance, and means for varying the initial position of the slidable member to vary said predetermined distance.

8. A machine of the class described having, in combination, a fixed pressure receiving member, a work table having a slidable stem, a sleeve surrounding the stem, means for urging the table away from the sleeve toward the fixed member, means for controlling the action of said urging means and locking the stem to the sleeve, and

means for moving the sleeve and the table together.

9. A machine of the class described hav ing, in combination, a fixed pressure receiv- 7 ing member, a work table having a slidable stem, a sleeve surrounding the stem, means for yieldingly moving said table toward the member to grip a piece of'work, a roll for locking the stem to the sleeve after the work is gripped, and means for moving the sleeve after the locking action to cause a positive movement of the table.

10. A machine of the class described having, in combination, a fixed pressure receiving member, a work table having a slidable stem, a sleeve surrounding the stem, springs for urging the table away from the sleeve toward the fixed member, a roll extending through said stem and having its ends engaging said sleeve, a block slidable in said stem and having a cam surface engageable with said roll, means for moving said block to cam the roll against the stem and'lock the latter to the sleeve, and means engaging" the sleeve for causing a positive movementof the work table after the locking action.

11. A machine of the class described having, in combination, a fixed pressure receiving member, a work table having a slidable stem, a sleeve enclosing the stem, springs for urging the table away from the'sleeve toward the fixed member'to clamp a piece of work, a roll extending across said stem and having its ends rolling in slots in the sleeve, a block slidable in said stem and having a cam surface engageable with said roll, an inclined face on said stem in the path of the roll, means for moving said block to cam the roll against the inclined face of the 

